Oscillating-cylinder printing-press.



'PATENTED SEPT. 25, 1906.

-J.-LUTZ. v OSGILLATING CYLINDER PRINTING'PRESS.

APPLICATION FILED APE-6. 1905.

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No. 831,962. PATENTED SEPT. 25; 1906.

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No. 831,962. PATENTED SEPT. 25, 1906. J. LUTZ.

OSGILLATING CYLINDER PRINTING PRESS.

APPLICATION FILED APR. 6. 1906.

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'No. 831,962. PATENTED SEPT. 25, 1906. J. LUTZ.

OSGILLATING GYLINDER PRINTING PRESS.

APPLICATION FILED 1mm. 1905.

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JULIUS LUTZ, OF HEIDELBERG-NEUENHEIM, GERMANY.

OSClLLATlNG-CYLINDER PRINTING-PRESS- Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed April 6, 1905. Serial No. 254,146.

To aZZ whom it may concern.-

Be it known that I, JULIUS LUTZ, director, a subject of the German Emperor, residing at Heidelberg-Neuenheim, Germany, have invented certain new and useful Improvements in or Relating to Oscillating-Cylinder Printing-Presses, of which the following is a specification.

The present invention has reference to oscillating-cylinder printing-presses-that is to say, presses in which the impressioncylinder makes partial revolutions alternately in opposite directions and in fixed bearings, the invention having for its chief object to construct a power-driven prime or first form and inner or second form press which shall be double-acting. For this purpose the impres sioncylinder is provided with two impression-surfaces which effect two prime or first form impressions during the forward motion of the cylinder and of the traveling type-bed which has two corresponding impression-surfaces, two inner or second form impressions being obtained during the return motion.

Inthe drawings, Figure 1 illustrates diagrammatically a power-press in accordance with this invention, and Figs. 2 to 10 are diagrammatic views illustrating the operation of the press in accordance with this invention.

The type-bed b is provided with two form or impression surfaces o and r, the cylinder a likewise having two corresponding impres sion-surfaces 1 2 and 3 4. On both sides of the impression-cylinder a are arranged inking and distributing rollers f for inking the forms 1; and 1' during the forward and return movements of the bed.

Underneath the bed I) in a known manner a rack is fastened, the teeth of which have not been shown. I/Vith the rack a toothed wheel B meshes, and the said wheel B also engages a rack C at the bottom of the machineframe. The teeth of the wheel B and rack C have not been shown. .The toothed wheel B is connected, by means of a rod D, with a crankwheel E, the latter being driven in a known manner by means of a toothed wheel fixed on the axis of a crank or fly-wheel. (Not shown.) I/Vhile the crank E is rotating the rod D is moved to and fro and causes a reciprocating movement of the bed I). As the foregoing manner of reciprocating the bed I) is well known, it is thought unnecessary to show the same more than as illustrated in Fig. 1.

Four grippers 1 2 3 4 on the impressioncylinder a serve to alternately seize and release the sheets of paper. a c are the cuttercylinders which sever said sheets as they are fed from a continuous web 1, or said sheets may be fed by hand. On the opposite side of the cylinder is arranged a turning-over device d of any well-known kind, which after the first impression turns the sheet over and feeds It to the pressure-surface of the bed to be printed on its other side. The taking-off device e, also well known, conducts the per fected sheets to the piling or laying-on mechanism.

Referring to Figs. 2 to 10, Fig. 2 shows the position of the impression-cylinder in the beginning of the forward movement; Fig. 3, in the beginning of the printing. Fig. 4 shows in which manner the second sheet (dash, three points) is seized by the grippers. Fig. 5 shows the beginning of the first sheet (dash, point) being delivered to the turning-over device. Fig. 7 shows the position of the parts in the beginning of the backward movement. In Fig. 8 the turnedover first sheet (dash, point) is seized by the grippers of the impression-cylinder. In Fig. 9 the first sheet is printed on its back side and delivered by the roller 6, Whereas the second sheet is seized by the grippers. In Fig. 10 the second sheet is printed on its back side and then delivered by the roller 6.

The operation of the machine is as follows: After the type-bed b has commenced its forward travel the grippers 1 seize the sheets which have been fed to them by the rollers i and severed from the web by the cutters c c and lay it on the form lying on the pressure surface a of the bed as it passes under the cylinder. After the printing said sheet is passed on by means of feeding-out grippers m to the turning-over device in the well-known way. Meanwhile the grippers 3 seize the neXt sheet which is delivered at the point i and which is then printed on the form r, on which latter it passes on to the turning-over device d. The bed and the impression-cylinder driven thereby have a forward motion of such length that the gripper 4 comes into action at the point of delivery 8 of the reversing device, after which the return of the bed commences. At a proximate point the grippers 4 seize the first sheet as it is delivered by the turningover device and lay it, blank side downward,

on the form lying on 1". By the time the gripper 2 reaches the point 8 the second sheet has been turned over, so that it also is seized and IIO has its blank side printed on the form lying on 12. Meanwhile the first sheet, printed on both sides, has reached the delivery device 6, which delivers it to the piling or laying-on mechanism. On the further return motion the piling or laying-on of the second sheet takes place in similar manner.

The bed-motion and inking mechanism are similar to those of existing stop-cylinder presses.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. An oscillating-cylinder printing-press comprising a reciprocatory bed having two forms, an oscillatory impression-cylinder oscillating in one direction during the forward travel of the bed and in the opposite direction during the rear travel of the bed, said cylin der provided with two impression-surfaces, gripping devices for retaining the sheets upon the cylinder when oscillating in both directions so that the sheets will be printed upon both sides, and a turn-over device for the said sheets printed on one side, combined with means for separating two sheets from a single web at each reciprocating movement of the bed, and for delivering said pair of sheets to the gripping devices.

2. An oscillating-cylinder printing-press comprising a reciprocatory bed having a plurality of forms, an oscillatory impression-cylinder oscillating in one direction during the forward travel of the bed and in the opposite direction during the rearward travel of the bed, and provided with impression-surfaces corresponding in number to the number of said forms, gripping devices for retaining a plurality of sheets upon the cylinder when said cylinder is oscillated in both directions so that the sheets will be printed upon both sides, and a turn-over device for the sheets that are printed on one side.

3. An oscillating-cylinder printing-press comprising a reciprocatory bed having a plurality of forms, an oscillatory impression-cylinder oscillating in one direction during the forward travel of the bed and in the opposite direction during the rearward travel of the bed, and provided with impression-surfaces corresponding in number to the number of said forms, gripping devices for retaining a plurality of sheets upon the cylinder when said cylinder is oscillated in both directions so that the sheets will beprinted upon both sides, and a turn-over device for the sheets that are printed on one side, combined with means for separating a plurality of sheets from a single web at each reciprocating movement of the bed and then delivering saidplurality of sheets to the gripping devices.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JULIUS LUTZ.

Witnesses:

J os. H. LEUTE, H. W. HARRIS. 

